Frictional group fastening effectiveness of mini gang saw blades in the frame sawing machine

Orłowski, Kazimierz A.; Wasielewski, R.; Blacharski, Wojciech

doi:10.1007/s001070050464

Cited by 2 publications

(3 citation statements)

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“…All the saw blades were fixed together in the gang, using a friction force-based mechanism similar to the solution described in the report 39 . The procedure for fixing the saw blades included the pre-tensioning of the entire saw blade assembly by providing a force of F N = 9450 N on each blade (Fig.…”

Section: Reference Case Studymentioning

confidence: 99%

“…The case study presented is a follow-up of the long-term experimental campaign conducted by authors in the past. It includes studies on the effectiveness of frictional narrow-saw blade fastening in the gang 39 , methods of determining static saw blade stiffness 40 , washboarding phenomenon and dynamic behaviour of narrow-kerf saw blades while sawing soft and hard woods 20 , economic analyses of lamellae production methods 31 , quality of re-sawing process 37 , 41 , application of fracture mechanics for determination of energetic effects while wood sawing 42 , 43 , and dynamics of the main driving system of the sash gang sawing machine 44 . This work focuses on an analysis of the re-sawing processes of thin lamellae performed on the gang saw when implementing narrow-kerf saws.…”

Section: Introductionmentioning

confidence: 99%

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Lateral forces determine dimensional accuracy of the narrow-kerf sawing of wood

Orłowski

Chuchała

Szczepański

et al. 2022

Sci Rep

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The shrinking global forest area limits the supply of industrially usable raw resources. This, in combination with the ever-increasing consumption of timber due to population growth can lead to the lack of a positive balance between the annual volumetric growth and consumption of wood. An important innovation toward increasing environmental and economic sustainability of timber production is to reduce the volume of wood residues by minimizing the sawing kerf. It results in higher material yield but may impact the dimensional accuracy of derived products. Therefore, the cutting tool geometry as well as the sawing process as a whole must be carefully optimized to assure optimal use of resources. The goal of this study is to better understand the causes of machining errors that occur when sawing wood with saws of varying thickness of kerf, with a special focus on re-sawing thin lamellae performed on the gang saw. Numerical simulations were tested against experimental results, considering influence of diverse components of cutting forces, in addition to the initial and operating stiffness coefficients of the saw blade. It has been demonstrated that asymmetric loads from the cutting process for the scraper saw blade can cause sawing inaccuracies. The simulation methodology developed in this research can be straightforwardly extended towards determination of optimal geometry of other cutting tools, particularly with the reduced sawing kerf. This may lead to more sustainable use of natural resources as well as an increase in economic gain for the wood processing industries.

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Section: Reference Case Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lateral forces determine dimensional accuracy of the narrow-kerf sawing of wood

Orłowski

Chuchała

Szczepański

et al. 2022

Sci Rep

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“…Steele et al (1992) stated that raw material cost might account for even 75% of the total sawmill manufacturing process cost. To lower the material cost of the thin lamellae re-sawing operations, narrow kerf sawing processes based on the use of either frame sawing machines or the use of narrow kerf circular saws were developed (Orłowski et al 2001;Schultz and Haas 2001). The technologies mentioned mainly concern the cutting of dry wood.…”

Section: Introductionmentioning

confidence: 99%

Capacity of surface production of band sawing in manufacture of oak floor upper layers

Orłowski

Chuchała

Stenka

et al. 2023

BioRes

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Thin lamellae, corresponding to the layer components of structural glued members, i.e., 2-ply or 3-ply glued flooring, can be manufactured in re-sawing operations of kiln-dried wood blocks or in wet technologies, which currently seem to be more common because of the shorter drying time. The re-sawing process in wet technology is conducted on dedicated thin-cutting band sawing machines with stellite-tipped band saws. The goal of this research was to demonstrate the capacity of surface production (m2/ tool life) of visible layers of oak engineered flooring composites in a function of both a new band saw and a re-sharpened band saw blade. Additionally, the state of teeth of each band saw blade was examined at the end of the tool life. A series of cutting tests were performed in sawmill production conditions. The conducted tests revealed that a three times higher capacity of surface production was obtained for the new tool compared to re-sharpened tool. Additional microscopic observations of some re-sharpened teeth showed deformed plastic characteristics.

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Frictional group fastening effectiveness of mini gang saw blades in the frame sawing machine

Cited by 2 publications

References 0 publications

Lateral forces determine dimensional accuracy of the narrow-kerf sawing of wood

Lateral forces determine dimensional accuracy of the narrow-kerf sawing of wood

Capacity of surface production of band sawing in manufacture of oak floor upper layers

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